91色情片

An automatic pistol that shoots only in the hands of police officers is being
developed by Colt鈥檚 Manufacturing Company. The 鈥渟mart鈥� gun fires on a signal
from a transponder that sends out radio waves carrying a unique digital code.
The transponder is so small it can be hidden in a ring, watch or shirtsleeve
button and has a range of about 20 centimetres.